US3434506A - Weft yarn anchoring arrangement for needle looms - Google Patents
Weft yarn anchoring arrangement for needle looms Download PDFInfo
- Publication number
- US3434506A US3434506A US596012A US3434506DA US3434506A US 3434506 A US3434506 A US 3434506A US 596012 A US596012 A US 596012A US 3434506D A US3434506D A US 3434506DA US 3434506 A US3434506 A US 3434506A
- Authority
- US
- United States
- Prior art keywords
- weft
- needle
- weft inserting
- weft yarn
- inserting means
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
-
- D—TEXTILES; PAPER
- D03—WEAVING
- D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
- D03D35/00—Smallware looms, i.e. looms for weaving ribbons or other narrow fabrics
Definitions
- the present invention relates to an improvement of needle looms of the type in which a weft inserting member is mounted on one side of the loom and is first moved to the other side for inserting a weft yarn, and then returned to its initial position after the inserted weft yarn has been anchored on the other side of the fabric by a loop formmg means.
- the weft inserting means and the loop forming means reciprocate in the same plane.
- the loop forming means such as a latch needle
- the weft inserting means is advanced to cross the weft inserting means so that its hook moves beyond the weft yarn.
- the weft inserting means is retracted, the weft yarn is caught by the hook of the latch needle, and while the same is retracted, an anchoring loop is formed.
- the weft inserting means performs a composite circular and oscillating motion in a plane which only slightly improves the catching of the weft yarn by the latch needle, but requires a very complicated control arrangement for operating the weft inserting means.
- the weft inserting means is reciprocated along a straight path, while the loop forming latch needle is controlled to perform an oscillating or elliptic motion.
- This arrangement has the disadvantage that due to the transverse and irregular movements of the loop forming latch needle, comparatively large and loose loops are formed.
- the improvements of the invention comprises mounting means for mounting weft in- 3,434,506 Patented Mar. 25, 1969 serting means for reciprocating movement in Weft inserting direction, and also in a direction transverse to the direction of reciprocation, and control means for moving the weft inserting means in a transverse movement when the weft yarn transported by the Weft inserting means crosses the loop forming means so that the weft yarn is moved toward and caught by the loop forming means, and formed by the same into a loop for anchoring the inserted weft yarn.
- the loop forming means is a latch needle reciprocated in warp direction along the edge of the fabric, the latch being opened in the advanced end position.
- the weft inserting means moving from one side of the fabric to the other side has a yarn holding end portion which is located on the other side of the fabric in an advanced end position of the weft inserting means. In this position, the weft yarn extends from the yarn holding end portion to the side of the fabric from which it was inserted into the warp shed, and across the open hook of the latch needle.
- control means operate the weft inserting means to perform a transverse motion by which the inserted weft yarn is placed in the open hook of the latch needle so that the same can form a loop of the same whereby the weft yarn is anchored.
- the transverse movement of the weft inserting means can be a dipping motion toward the lower level of the plane in which the latch needle reciprocates, or a turning motion which also lowers the weft yarn.
- the arrangement of the invention has the advantage that the weft inserting means performs only few simple motions so that the weft yarn is not subjected to high friction and thin weft yarns can be used.
- the insertion of the weft yarn into the loop forming means is reliably effected, without requiring time consuming and difiicult exact adjustments of the relative position of the loop forming means and weft inserting means. Since the weft inserting means and loop forming means operate in different planes, a collision is impossible. Since the loop forming latch needle performs only short reciprocating strokes since it does not cross the path of the weft inserting means, small anchoring loops are formed. Also, a comparatively short weft inserting means can be used so that vibrations are avoided.
- FIG. 1 is a fragmentary elevation illustrating an initial position of an apparatus according to the invention
- FIG. 2 is a fragmentary elevation illustrating a second position of the apparatus
- FIG. 3 is a fragmentary elevation illustrating a third position of the apparatus
- FIG. 4 is a fragmentary plan view illustrating th position of FIG. 1;
- FIG. 5 is a fragmentary plan view illustrating the position of FIG. 2;
- FIG. 6 is a fragmentary plan view illustrating the position of FIG. 3;
- FIG. 7 is a schematic plan view illustrating control means for the weft inserting means used in the apparatus of FIGS. 1 to 6;
- FIG. 8 is a fragmentary schematic side View of the control means shown in FIG. 7;
- FIG. 9 is a fragmentary plan view illustrating a detail of the modified construction of the control means shown in FIG. 7.
- a fabric 1, such as a band or ribbon, is woven of warps 3 and 4 and weft yarns inserted by a weft inserting member 11 which has a forked end portion with two prongs 10.
- a yarn guide not shown, inserts a Weft yarn 6 in the forked end portion of weft inserting means 11 when the same is in an initial position located on one side of the fabric.
- a loop forming latch needle having a hook opened and closed by a latch 12 is reciprocated in warp direction along the edge of the fabric.
- a reed 2 is reciprocated in the usual manner for beating the inserted Weft yarns into the fell 7 of the fabric after the inserted weft yarn has been anchored by a loop held by the hook 8 and latch 12 of loop forming needle 5, as shown in FIGS. 1 and 4.
- weft inserting member 11 may be provided with an eye through which the weft yarn 6 passes.
- weft inserting means 11 In the position shown in FIGS. 2 and 5, weft inserting means 11 has advanced toward the other side of the fabric, and loop forming needle '5 has also advanced to an end position. Weft inserting means 11 moves through a warp shed formed rearwardly of reed 2 in the usual manner.
- the yarn holding end portion 10 of weft inserting means 11 is located on the other side of the warp shed and fabric, and the weft portion 6a extends at an angle to the directions of reciprocation of weft inserting means 11 and of loop forming needle 5 and across the open hook 8 of the loop forming needle.
- Latch 12 was opened during the forward movement of needle 5 through the old loop 9 of the last insert weft.
- the weft inserting member is at first still in the position shown in FIG. 2.
- Weft insering member 11 is now controlled to perform a downward dipping motion to the position shown in FIG. 3 so that weft yarn portion 6a is placed in hook 8.
- latch needle 5 starts its return stroke toward the left as viewed in the drawing, pulling weft yarn portion 6a toward the old loop 9 which first engages the open latch 12, and then turns the same to the closed position.
- a loop of weft yarn portion 6a is drawn through the old loop 9, whereupon the latter is cast off and the needle 5 is in the fully retracted end position shown in FIGS.
- weft inserting means is moved from the fully advanced position shown in FIG. 6 to the initial position shown in FIG. 4.
- weft inserting means 11 instead of causing a dipping motion of weft inserting means 11 for placing the weft yarn in the hook 8 of needle 5, it is also possible to cause a turning motion of weft inserting means 11 about its longitudinal axis of symmetry in counterclockwise direction, as viewed in FIG. 3 so that prong 10a presses weft yarn portion 6a downwardly into the open hook 8 of needle 5, whereupon the above described operation is continued,
- FIGS. 7 and 8 show control means for reciprocating weft inserting means 11 across the fabric, and for dipping weft inserting member for insertion of the weft thread into the needle.
- a rotary cam drum 13 has a helical track 14 into which a cam follower roller 15 of a prismatic bearing member 16 projects.
- Member 16 has a bearing in which a shaft 17 is mounted for turning movement, but non-movable in axial direction in relation to member 16.
- Shaft 17 is mounted in bearings 18 for axial and rotary movement.
- a lever 23 is secured to one end of shaft 17 and carries weft inserting means 11.
- Another lever 19 is also secured to shaft 17 and carries a cam follower roller 20 cooperating with a rotary cam 21 having a cam lug 22 cooperating with cam follower roller 20.
- shaft 17 is axially reciprocated together with weft inserting means 11 so that the same moves into and out of the warp sheds, as explained above.
- This reciprocating motion is carried out in synchronisrrr with the reciprocating motion of loop forming needle 5 which is operated by a rotary cam drum similar to cam drum 13.
- a shaft 25 is driven from shaft 24 by a chain drive 26, 27, 28, and is mounted in bearlugs 29.
- Shaft 25 carries a disc 30 with an crank pin 31 engaging a fork 32 secured to the needle 5 which is guided in bearings 33. Due to the rotation of disc 30 with pin 31, needle 5 is moved in reciprocating motion.
- Weft inserting means is moved in a forward stroke from the position of FIG. 4 to the position of FIG. 6 while loop forming needle 5 is moved from the retracted position of FIG. 4 to the advanced position of FIG. 6.
- follower roller 20' cooperates with the circular peripheral portion of cam 21, but in the position of FIG. 3 and FIG. 6, cam lug 22 engages roller 20 and turns lever 19 together with shaft 17 and lever 23 so that weft inserting means 11 performs a short downward movement transverse to the direction of its reciprocation for placing the weft yarn 6 in the book 8, as best seen in FIG. 3.
- loop forming needle 5 and weft inserting means 11 are retracted in return strokes so that the weft yarn portion 6a is caught and pulled through the old loop 9 which first closes latch 12.
- loop forming needle 5 and weft inserting means 11 are retracted in return strokes so that the weft yarn portion 6a is caught and pulled through the old loop 9 which first closes latch 12.
- a new loop is formed in the position of loop 9 in FIG. 4, and the inserted weft yarn is tied at the edge of the fabric whereupon the reed moves to the position shown in FIG. 4 so that a new warp shed can be formed.
- FIG. 9 illustrates a modification in which the longitudinal axis of symmetry of the prongs 10 and of weft inserting means 11 coincides with shaft 17' so that weft inserting means 11 axially projects from the end of shaft 17 Due to the omission of lever 23, weft inserting means does not perform a dipping downward motion as in the embodiment of FIG. 7, when shaft 17' is turned under the control of cam lug 22 by cam follower means 19, 20.
- Weft inserting means 11 performs an angular movement about its axis so that the prong 10a moves downward and the other prong moves upward, for depressing weft yarn portion 6a in the position of FIG. 6 to move into the open hook 8 as shown in FIG. 3.
- Rotary cam 21, 22, cam drum 13, and the cam drum driving the loop forming means 5 are all driven from the main shaft of the loom to operate in timed relation.
- a :weft inserting means reciprocable across the warps of a fabric woven on said loom from one side to the other side of the loom and fabric; loop forming means reeiprocable in warp direction along said other side of the fabric; mounting means for mounting said weft inserting means for reciprocation in weft direction and also for movement in a direction transverse to said weft direction and said warp direction; and operating means including first control means connected with said mounting means for reciprocating said weft inserting means through the warp sheds of said fabric, second control means connected with said mounting means for moving said weft inserting means in a transverse movement, and third control means for reciprocating said loop forming means in warp direction, said operating means operating said second and third control means in a time relation so that weft inserting means is moved in said transverse movement when the weft yarn transported thereby crosses said loop forming means whereby the weft yarn is moved toward and caught by said loop forming means, and formed
- said weft inserting means includes an elongated straight, substantially rigid weft inserting member; wherein said mounting means support said weft inserting member for reciprocation in longitudinal direction thereof; and wherein said second control means move the entire weft inserting member in said transverse movement toward said loop forming means.
- said loop forming means is a latch needle having a hook; and wherein said weft inserting means places said weft yarn in the path of said hook during said transverse movement.
- said mounting means include a support for said weft inserting means rotatable about an axis and reciprocable in axial direction so that said weft inserting means performs said transverse movement when said support rotates about said axis.
- said support includes a shaft, and a lever secured to said shaft and carrying said weft inserting means so that the same performs a transverse dipping motion toward said loop forming means when said shaft is rotated.
- said support includes a shaft mounted for rotation and for axial movement; and wherein said weft inserting means projects in axial direction from one end of said shaft so that said tarnsverse movement is an angular displacement of said weft inserting means.
- said operating means reciprocates said loop forming means in warp direction along said other side of said fabric to an advanced end position; wherein said loop forming means is a latch needle having a hook open in said advanced end position; wherein said weft inserting means has a yarn holding end portion, and is reciprocated by said first control means to an advanced end position in which said yarn holding end portion is located at said other side of said fabric, and in which position the weft yarn extending from said yarn holding end portion to said one side of the fabric crosses said open hook; and wherein said second control means moves said Weft inserting means with said yarn holding end portion in said transverse movement toward the region in which said open hook is located so that said weft yarn is placed in said hook and caught by the same during the following return stroke of said latch needle.
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Looms (AREA)
- Knitting Machines (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH1593765A CH435140A (de) | 1965-11-20 | 1965-11-20 | Verfahren und Vorrichtung zum Eintragen des Schusses in Bandwebmaschinen mit nadelförmigen Schusseintragorganen |
Publications (1)
Publication Number | Publication Date |
---|---|
US3434506A true US3434506A (en) | 1969-03-25 |
Family
ID=4413180
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US596012A Expired - Lifetime US3434506A (en) | 1965-11-20 | 1966-11-21 | Weft yarn anchoring arrangement for needle looms |
Country Status (7)
Country | Link |
---|---|
US (1) | US3434506A (es) |
AT (1) | AT276264B (es) |
CH (1) | CH435140A (es) |
DE (1) | DE1535531B2 (es) |
ES (1) | ES333566A1 (es) |
GB (1) | GB1163131A (es) |
NL (1) | NL6616251A (es) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3908708A (en) * | 1971-12-27 | 1975-09-30 | Yoshida Kogyo Kk | Means for guiding weft threads |
US4027703A (en) * | 1974-10-16 | 1977-06-07 | Jakob Muller, Forschungs-Und Finanz Ag | Shuttleless weaving machine, especially ribbon loom |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2130636A (en) * | 1936-09-19 | 1938-09-20 | Clutsom Charles | Looms with stationary weft supplies |
US2229011A (en) * | 1937-12-03 | 1941-01-14 | Clutsom Charles | Loom with stationary weft supply |
US2280478A (en) * | 1940-06-15 | 1942-04-21 | Clutsom Charles | Loom with stationary weft supplies |
US2532087A (en) * | 1948-04-20 | 1950-11-28 | Clutsom Charles | Loom with stationary weft supply |
US2980146A (en) * | 1958-04-03 | 1961-04-18 | Continental Elastic Corp | High speed loom |
US3064689A (en) * | 1959-02-26 | 1962-11-20 | Brevitex Ets | Weaving device for bands, belts and like articles |
-
1965
- 1965-11-20 CH CH1593765A patent/CH435140A/de unknown
-
1966
- 1966-01-03 AT AT2166A patent/AT276264B/de active
- 1966-11-18 GB GB51669/66A patent/GB1163131A/en not_active Expired
- 1966-11-18 NL NL6616251A patent/NL6616251A/xx unknown
- 1966-11-18 DE DE1966M0071692 patent/DE1535531B2/de active Granted
- 1966-11-19 ES ES333566A patent/ES333566A1/es not_active Expired
- 1966-11-21 US US596012A patent/US3434506A/en not_active Expired - Lifetime
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2130636A (en) * | 1936-09-19 | 1938-09-20 | Clutsom Charles | Looms with stationary weft supplies |
US2229011A (en) * | 1937-12-03 | 1941-01-14 | Clutsom Charles | Loom with stationary weft supply |
US2280478A (en) * | 1940-06-15 | 1942-04-21 | Clutsom Charles | Loom with stationary weft supplies |
US2532087A (en) * | 1948-04-20 | 1950-11-28 | Clutsom Charles | Loom with stationary weft supply |
US2980146A (en) * | 1958-04-03 | 1961-04-18 | Continental Elastic Corp | High speed loom |
US3064689A (en) * | 1959-02-26 | 1962-11-20 | Brevitex Ets | Weaving device for bands, belts and like articles |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3908708A (en) * | 1971-12-27 | 1975-09-30 | Yoshida Kogyo Kk | Means for guiding weft threads |
US4027703A (en) * | 1974-10-16 | 1977-06-07 | Jakob Muller, Forschungs-Und Finanz Ag | Shuttleless weaving machine, especially ribbon loom |
Also Published As
Publication number | Publication date |
---|---|
GB1163131A (en) | 1969-09-04 |
ES333566A1 (es) | 1968-03-16 |
DE1535531B2 (de) | 1976-05-13 |
NL6616251A (es) | 1967-05-22 |
DE1535531A1 (de) | 1970-11-05 |
CH435140A (de) | 1967-04-30 |
AT276264B (de) | 1969-11-25 |
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